I had the same question. My buddy shot 2 last Saturday, both in the neck. One dropped on the spot, the other went about 10 feet. Both were does with skinny necks, so it would have either been a solid hit or a solid miss. He uses expandables, which worked perfectly in both cases, severing the windpipe and several blood vessels. It appears that both were very effective shots, but I don't know that I have the confidence to take them. I'm using slick tricks with the 1 1/8" blades, which is a lot less cutting diameter than the expandables that he's using. They make a great hole, but don't have the same probability of hitting one of the major blood vessels.